Figure 6 illustrates a simple music Catalog category hierarchy with a single music product associated to two categories.

图6演示了一个简单的Music catalog类别层次结构，其中一个音乐作品与两个类别有关。

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Next we will deal with what's the--arguably-- the single most important thing when we listen to any piece of music and that is its musical form.

接下来我们要处理一个有争议的问题,音乐作品中的最重要的部分是什么,那就是曲式

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with a piece of popular music you get a single ethos, a single feeling,a single mood associated with the piece, and the piece will tend to be shorter.

在流行乐里，一首歌只表达一个中心思想，一种感觉，一种情绪，所以这首作品也就会短小一些。

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Complicating matters is the fact that there may be multiple copyright owners on a single music video.

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Not a single music CD or Microsoft CD was produced during those weeks.

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They were joined by a battalion of women singing the now familiar Oh-oh-oh-oh-oh-oh lyrics while doing the matching hand flips and foot marching from the Single Ladies music video.

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